package com.itheima;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.function.Consumer;

public class HashSetDemo {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("张三");
        list.add("李四");
        list.add("王五");
        list.add("王五");
        System.out.println(list);

        ArrayList<String> newList = new ArrayList<>((new HashSet<String>(list)));

        System.out.println(newList);

        //1.创建HashSet对象
        HashSet<String> hashSet = new HashSet<>();
        //2.保存数据
        hashSet.add("A");
        hashSet.add("B");
        hashSet.add("C");
        hashSet.add("D");
        System.out.println(hashSet);
        //3.取数据（迭代器）
        Iterator<String> iterator = hashSet.iterator();
        while (iterator.hasNext()) {
            String next = iterator.next();
            System.out.println(next);
        }
        //4.取数据（增强for循环）
        for (String name : hashSet){
            System.out.println("name="+name);
        }
        int[] arr = {1,2,3,4,5,6,7,8,9,10};
        for (int i : arr) {
            System.out.println(i);
        }
        //5.取数据(Lambda)
        hashSet.forEach(new Consumer<String>() {
            @Override
            public void accept(String s) {
                System.out.println(s);
            }
        });
        hashSet.forEach(s ->System.out.println(s));
        hashSet.forEach(System.out::println);

        Student student = new Student("张三",28);
        System.out.println(student.toString());
    }
}
